/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem16_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:16:09,549 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:16:09,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:16:09,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:16:09,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:16:09,594 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:16:09,595 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:16:09,596 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:16:09,597 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:16:09,598 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:16:09,599 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:16:09,600 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:16:09,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:16:09,601 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:16:09,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:16:09,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:16:09,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:16:09,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:16:09,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:16:09,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:16:09,608 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:16:09,618 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:16:09,620 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:16:09,622 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:16:09,629 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:16:09,630 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:16:09,630 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:16:09,631 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:16:09,631 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:16:09,632 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:16:09,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:16:09,632 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:16:09,633 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:16:09,634 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:16:09,634 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:16:09,634 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:16:09,634 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:16:09,635 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:16:09,635 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:16:09,635 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:16:09,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:16:09,636 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 22:16:09,660 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:16:09,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:16:09,660 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:16:09,661 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:16:09,661 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:16:09,662 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:16:09,662 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:16:09,662 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:16:09,662 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:16:09,662 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:16:09,663 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:16:09,663 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:16:09,663 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:16:09,663 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:16:09,663 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:16:09,663 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:16:09,664 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:16:09,664 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:16:09,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:16:09,664 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:16:09,665 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:16:09,665 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:16:09,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:16:09,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:16:09,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:16:09,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:16:09,666 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:16:09,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:16:09,666 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:16:09,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:16:09,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:16:09,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:16:09,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:16:09,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:16:09,667 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:16:09,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:16:09,667 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:16:09,667 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:16:09,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:16:09,668 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:16:09,668 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:16:09,668 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:16:09,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:16:09,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:16:09,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:16:09,923 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:16:09,923 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:16:09,924 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label18.c [2023-03-31 22:16:11,074 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:16:11,387 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:16:11,388 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label18.c [2023-03-31 22:16:11,411 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cff3186d/615ac63975b94edf9b7b176964b49dd2/FLAG55d7d0439 [2023-03-31 22:16:11,429 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cff3186d/615ac63975b94edf9b7b176964b49dd2 [2023-03-31 22:16:11,432 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:16:11,434 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:16:11,435 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:16:11,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:16:11,443 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:16:11,444 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:16:11" (1/1) ... [2023-03-31 22:16:11,445 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60756ff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:16:11, skipping insertion in model container [2023-03-31 22:16:11,445 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:16:11" (1/1) ... [2023-03-31 22:16:11,451 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:16:11,509 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:16:11,689 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label18.c[1111,1124] [2023-03-31 22:16:12,086 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:16:12,095 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:16:12,106 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label18.c[1111,1124] [2023-03-31 22:16:12,381 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:16:12,395 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:16:12,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:16:12 WrapperNode [2023-03-31 22:16:12,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:16:12,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:16:12,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:16:12,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:16:12,407 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:16:12" (1/1) ... [2023-03-31 22:16:12,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:16:12" (1/1) ... [2023-03-31 22:16:12,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:16:12" (1/1) ... [2023-03-31 22:16:12,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:16:12" (1/1) ... [2023-03-31 22:16:12,502 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:16:12" (1/1) ... [2023-03-31 22:16:12,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:16:12" (1/1) ... [2023-03-31 22:16:12,537 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:16:12" (1/1) ... [2023-03-31 22:16:12,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:16:12" (1/1) ... [2023-03-31 22:16:12,570 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:16:12,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:16:12,571 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:16:12,571 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:16:12,572 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:16:12" (1/1) ... [2023-03-31 22:16:12,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:16:12,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:16:12,610 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 22:16:12,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 22:16:12,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:16:12,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:16:12,651 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:16:12,653 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:16:12,653 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:16:12,653 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:16:12,653 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:16:12,653 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:16:12,653 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:16:12,653 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:16:12,653 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:16:12,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:16:12,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:16:12,654 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:16:12,654 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:16:12,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:16:12,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:16:12,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:16:12,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:16:12,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:16:12,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:16:12,732 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:16:12,734 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:16:14,568 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:16:15,844 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:16:15,846 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:16:15,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:16:15 BoogieIcfgContainer [2023-03-31 22:16:15,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:16:15,855 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:16:15,855 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:16:15,858 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:16:15,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:16:11" (1/3) ... [2023-03-31 22:16:15,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@338193ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:16:15, skipping insertion in model container [2023-03-31 22:16:15,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:16:12" (2/3) ... [2023-03-31 22:16:15,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@338193ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:16:15, skipping insertion in model container [2023-03-31 22:16:15,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:16:15" (3/3) ... [2023-03-31 22:16:15,860 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label18.c [2023-03-31 22:16:15,877 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:16:15,878 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:16:15,938 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:16:15,945 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7252bbf6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:16:15,946 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:16:15,952 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 22:16:15,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:16:15,959 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:16:15,960 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:16:15,960 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:16:15,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:16:15,966 INFO L85 PathProgramCache]: Analyzing trace with hash -706799893, now seen corresponding path program 1 times [2023-03-31 22:16:15,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:16:15,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563072811] [2023-03-31 22:16:15,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:16:15,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:16:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:16:16,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:16:16,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:16:16,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563072811] [2023-03-31 22:16:16,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563072811] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:16:16,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:16:16,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:16:16,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059863873] [2023-03-31 22:16:16,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:16:16,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:16:16,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:16:16,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:16:16,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:16:16,435 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:16:17,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:16:17,934 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-03-31 22:16:17,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:16:17,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-03-31 22:16:17,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:16:17,952 INFO L225 Difference]: With dead ends: 718 [2023-03-31 22:16:17,952 INFO L226 Difference]: Without dead ends: 471 [2023-03-31 22:16:17,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:16:17,961 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:16:17,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 90 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-03-31 22:16:17,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-03-31 22:16:18,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 468. [2023-03-31 22:16:18,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 458 states have (on average 1.8384279475982532) internal successors, (842), 458 states have internal predecessors, (842), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-31 22:16:18,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 853 transitions. [2023-03-31 22:16:18,074 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 853 transitions. Word has length 11 [2023-03-31 22:16:18,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:16:18,075 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 853 transitions. [2023-03-31 22:16:18,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:16:18,075 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 853 transitions. [2023-03-31 22:16:18,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-03-31 22:16:18,078 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:16:18,078 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:16:18,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:16:18,079 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:16:18,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:16:18,080 INFO L85 PathProgramCache]: Analyzing trace with hash -879939688, now seen corresponding path program 1 times [2023-03-31 22:16:18,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:16:18,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166325842] [2023-03-31 22:16:18,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:16:18,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:16:18,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:16:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:16:18,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:16:18,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166325842] [2023-03-31 22:16:18,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166325842] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:16:18,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:16:18,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:16:18,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481180839] [2023-03-31 22:16:18,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:16:18,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:16:18,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:16:18,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:16:18,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:16:18,217 INFO L87 Difference]: Start difference. First operand 468 states and 853 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:16:19,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:16:19,693 INFO L93 Difference]: Finished difference Result 1410 states and 2605 transitions. [2023-03-31 22:16:19,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:16:19,693 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-03-31 22:16:19,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:16:19,700 INFO L225 Difference]: With dead ends: 1410 [2023-03-31 22:16:19,700 INFO L226 Difference]: Without dead ends: 947 [2023-03-31 22:16:19,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:16:19,703 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 889 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:16:19,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [889 Valid, 43 Invalid, 1644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 1247 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-03-31 22:16:19,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2023-03-31 22:16:19,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 924. [2023-03-31 22:16:19,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 906 states have (on average 1.7339955849889626) internal successors, (1571), 910 states have internal predecessors, (1571), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2023-03-31 22:16:19,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1604 transitions. [2023-03-31 22:16:19,745 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1604 transitions. Word has length 22 [2023-03-31 22:16:19,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:16:19,746 INFO L495 AbstractCegarLoop]: Abstraction has 924 states and 1604 transitions. [2023-03-31 22:16:19,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:16:19,746 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1604 transitions. [2023-03-31 22:16:19,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-31 22:16:19,747 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:16:19,747 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:16:19,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:16:19,747 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:16:19,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:16:19,748 INFO L85 PathProgramCache]: Analyzing trace with hash -272492635, now seen corresponding path program 1 times [2023-03-31 22:16:19,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:16:19,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87106876] [2023-03-31 22:16:19,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:16:19,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:16:19,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:16:19,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:16:19,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:16:19,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87106876] [2023-03-31 22:16:19,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87106876] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:16:19,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:16:19,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:16:19,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382810054] [2023-03-31 22:16:19,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:16:19,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:16:19,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:16:19,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:16:19,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:16:19,845 INFO L87 Difference]: Start difference. First operand 924 states and 1604 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:16:21,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:16:21,324 INFO L93 Difference]: Finished difference Result 2556 states and 4514 transitions. [2023-03-31 22:16:21,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:16:21,325 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-03-31 22:16:21,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:16:21,334 INFO L225 Difference]: With dead ends: 2556 [2023-03-31 22:16:21,334 INFO L226 Difference]: Without dead ends: 1637 [2023-03-31 22:16:21,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:16:21,338 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 994 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:16:21,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [994 Valid, 45 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-03-31 22:16:21,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2023-03-31 22:16:21,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1605. [2023-03-31 22:16:21,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1573 states have (on average 1.477431659249841) internal successors, (2324), 1583 states have internal predecessors, (2324), 11 states have call successors, (11), 11 states have call predecessors, (11), 20 states have return successors, (69), 10 states have call predecessors, (69), 10 states have call successors, (69) [2023-03-31 22:16:21,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 2404 transitions. [2023-03-31 22:16:21,394 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 2404 transitions. Word has length 23 [2023-03-31 22:16:21,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:16:21,394 INFO L495 AbstractCegarLoop]: Abstraction has 1605 states and 2404 transitions. [2023-03-31 22:16:21,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:16:21,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 2404 transitions. [2023-03-31 22:16:21,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-03-31 22:16:21,397 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:16:21,397 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:16:21,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:16:21,398 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:16:21,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:16:21,398 INFO L85 PathProgramCache]: Analyzing trace with hash 364352178, now seen corresponding path program 1 times [2023-03-31 22:16:21,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:16:21,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242055071] [2023-03-31 22:16:21,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:16:21,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:16:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:16:21,697 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:16:21,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:16:21,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242055071] [2023-03-31 22:16:21,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242055071] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:16:21,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424072094] [2023-03-31 22:16:21,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:16:21,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:16:21,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:16:21,705 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:16:21,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:16:21,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:16:21,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:16:21,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:16:21,929 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 22:16:21,929 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:16:21,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424072094] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:16:21,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:16:21,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-03-31 22:16:21,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001815154] [2023-03-31 22:16:21,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:16:21,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:16:21,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:16:21,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:16:21,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:16:21,932 INFO L87 Difference]: Start difference. First operand 1605 states and 2404 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:16:22,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:16:22,868 INFO L93 Difference]: Finished difference Result 3436 states and 5156 transitions. [2023-03-31 22:16:22,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:16:22,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 92 [2023-03-31 22:16:22,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:16:22,877 INFO L225 Difference]: With dead ends: 3436 [2023-03-31 22:16:22,878 INFO L226 Difference]: Without dead ends: 1836 [2023-03-31 22:16:22,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:16:22,882 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 237 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-03-31 22:16:22,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 423 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-03-31 22:16:22,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1836 states. [2023-03-31 22:16:22,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1836 to 1830. [2023-03-31 22:16:22,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 1796 states have (on average 1.4387527839643652) internal successors, (2584), 1806 states have internal predecessors, (2584), 12 states have call successors, (12), 12 states have call predecessors, (12), 21 states have return successors, (81), 11 states have call predecessors, (81), 11 states have call successors, (81) [2023-03-31 22:16:22,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 2677 transitions. [2023-03-31 22:16:22,932 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 2677 transitions. Word has length 92 [2023-03-31 22:16:22,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:16:22,933 INFO L495 AbstractCegarLoop]: Abstraction has 1830 states and 2677 transitions. [2023-03-31 22:16:22,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:16:22,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 2677 transitions. [2023-03-31 22:16:22,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-03-31 22:16:22,936 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:16:22,936 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:16:22,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 22:16:23,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:16:23,145 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:16:23,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:16:23,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1411079109, now seen corresponding path program 1 times [2023-03-31 22:16:23,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:16:23,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113486150] [2023-03-31 22:16:23,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:16:23,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:16:23,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:16:23,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:16:23,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:16:23,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113486150] [2023-03-31 22:16:23,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113486150] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:16:23,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:16:23,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:16:23,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932782856] [2023-03-31 22:16:23,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:16:23,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:16:23,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:16:23,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:16:23,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:16:23,494 INFO L87 Difference]: Start difference. First operand 1830 states and 2677 transitions. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:16:25,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:16:25,027 INFO L93 Difference]: Finished difference Result 4851 states and 7168 transitions. [2023-03-31 22:16:25,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:16:25,030 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 135 [2023-03-31 22:16:25,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:16:25,049 INFO L225 Difference]: With dead ends: 4851 [2023-03-31 22:16:25,049 INFO L226 Difference]: Without dead ends: 3026 [2023-03-31 22:16:25,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:16:25,057 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 570 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:16:25,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 43 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 1293 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-03-31 22:16:25,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2023-03-31 22:16:25,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 2976. [2023-03-31 22:16:25,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2976 states, 2911 states have (on average 1.389556853315012) internal successors, (4045), 2942 states have internal predecessors, (4045), 17 states have call successors, (17), 17 states have call predecessors, (17), 47 states have return successors, (229), 16 states have call predecessors, (229), 16 states have call successors, (229) [2023-03-31 22:16:25,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2976 states to 2976 states and 4291 transitions. [2023-03-31 22:16:25,160 INFO L78 Accepts]: Start accepts. Automaton has 2976 states and 4291 transitions. Word has length 135 [2023-03-31 22:16:25,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:16:25,162 INFO L495 AbstractCegarLoop]: Abstraction has 2976 states and 4291 transitions. [2023-03-31 22:16:25,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:16:25,162 INFO L276 IsEmpty]: Start isEmpty. Operand 2976 states and 4291 transitions. [2023-03-31 22:16:25,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-03-31 22:16:25,173 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:16:25,173 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:16:25,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 22:16:25,174 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:16:25,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:16:25,175 INFO L85 PathProgramCache]: Analyzing trace with hash 678534428, now seen corresponding path program 1 times [2023-03-31 22:16:25,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:16:25,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594012251] [2023-03-31 22:16:25,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:16:25,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:16:25,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:16:25,415 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 22:16:25,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:16:25,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594012251] [2023-03-31 22:16:25,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594012251] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:16:25,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969626960] [2023-03-31 22:16:25,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:16:25,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:16:25,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:16:25,421 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:16:25,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:16:25,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:16:25,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:16:25,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:16:25,700 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 22:16:25,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:16:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 22:16:25,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969626960] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:16:25,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [748992449] [2023-03-31 22:16:25,901 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2023-03-31 22:16:25,901 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:16:25,904 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:16:25,908 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:16:25,908 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:16:26,012 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 46 for LOIs [2023-03-31 22:16:26,207 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 61 [2023-03-31 22:16:27,220 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 49 for LOIs [2023-03-31 22:16:27,506 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 61 [2023-03-31 22:16:54,757 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 37 for LOIs [2023-03-31 22:16:54,768 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:16:59,712 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22589#(and (= 3 ~inputC~0) (= 8 |old(~a16~0)|) (= ~a12~0 9) (= ~a16~0 8) (= 3 |old(~a15~0)|) (= ~inputD~0 4) (<= |calculate_output_#in~input| 6) (<= 1 |calculate_output_#in~input|) (= 5 ~inputE~0) (= ~a18~0 |old(~a18~0)|) (= 6 ~inputF~0) (= 9 |old(~a12~0)|) (= |calculate_output_#in~input| calculate_output_~input) (= |#NULL.offset| 0) (< 134 ~a18~0) (= ~a15~0 3) (= ~inputA~0 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 2 ~inputB~0))' at error location [2023-03-31 22:16:59,713 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:16:59,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:16:59,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-03-31 22:16:59,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200858330] [2023-03-31 22:16:59,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:16:59,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-31 22:16:59,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:16:59,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-31 22:16:59,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2023-03-31 22:16:59,715 INFO L87 Difference]: Start difference. First operand 2976 states and 4291 transitions. Second operand has 11 states, 11 states have (on average 21.09090909090909) internal successors, (232), 11 states have internal predecessors, (232), 5 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-03-31 22:17:03,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:17:03,254 INFO L93 Difference]: Finished difference Result 9945 states and 14807 transitions. [2023-03-31 22:17:03,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-31 22:17:03,255 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 21.09090909090909) internal successors, (232), 11 states have internal predecessors, (232), 5 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 144 [2023-03-31 22:17:03,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:17:03,297 INFO L225 Difference]: With dead ends: 9945 [2023-03-31 22:17:03,297 INFO L226 Difference]: Without dead ends: 6974 [2023-03-31 22:17:03,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 318 SyntacticMatches, 103 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2060 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=192, Invalid=864, Unknown=0, NotChecked=0, Total=1056 [2023-03-31 22:17:03,309 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 1451 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 5485 mSolverCounterSat, 605 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1454 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 6090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 605 IncrementalHoareTripleChecker+Valid, 5485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:17:03,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1454 Valid, 194 Invalid, 6090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [605 Valid, 5485 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-03-31 22:17:03,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6974 states. [2023-03-31 22:17:03,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6974 to 6716. [2023-03-31 22:17:03,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6716 states, 6559 states have (on average 1.235096813538649) internal successors, (8101), 6619 states have internal predecessors, (8101), 62 states have call successors, (62), 36 states have call predecessors, (62), 94 states have return successors, (1049), 60 states have call predecessors, (1049), 61 states have call successors, (1049) [2023-03-31 22:17:03,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6716 states to 6716 states and 9212 transitions. [2023-03-31 22:17:03,523 INFO L78 Accepts]: Start accepts. Automaton has 6716 states and 9212 transitions. Word has length 144 [2023-03-31 22:17:03,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:17:03,524 INFO L495 AbstractCegarLoop]: Abstraction has 6716 states and 9212 transitions. [2023-03-31 22:17:03,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.09090909090909) internal successors, (232), 11 states have internal predecessors, (232), 5 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-03-31 22:17:03,525 INFO L276 IsEmpty]: Start isEmpty. Operand 6716 states and 9212 transitions. [2023-03-31 22:17:03,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-03-31 22:17:03,527 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:17:03,528 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:17:03,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-31 22:17:03,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-03-31 22:17:03,735 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:17:03,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:17:03,736 INFO L85 PathProgramCache]: Analyzing trace with hash 539877229, now seen corresponding path program 1 times [2023-03-31 22:17:03,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:17:03,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550008609] [2023-03-31 22:17:03,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:03,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:17:03,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:17:04,008 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 73 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 22:17:04,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:17:04,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550008609] [2023-03-31 22:17:04,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550008609] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:17:04,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802765506] [2023-03-31 22:17:04,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:04,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:17:04,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:17:04,010 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:17:04,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 22:17:04,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:17:04,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:17:04,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:17:04,243 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 87 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:17:04,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:17:04,453 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 73 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 22:17:04,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802765506] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:17:04,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1264348335] [2023-03-31 22:17:04,460 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2023-03-31 22:17:04,461 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:17:04,461 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:17:04,465 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:17:04,466 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:17:04,545 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 46 for LOIs [2023-03-31 22:17:04,689 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 61 [2023-03-31 22:17:05,551 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 50 for LOIs [2023-03-31 22:17:05,728 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 61